0

download
DESCRIPTION Some vehicles may experience a body vibration when driving approximately 55mph. This symptom is due to the characteristics of the No. 3 & No. 4 engine mounts. Modified No. 3 & No. 4 engine mounts have been established for service only. Customers having this concern should have their vehicle repaired using the following repair procedure. REPAIR PROCEDURE IMPORTANT NOTE: • This repair should only be performed if all tires and rims are confirmed to be in balance and all suspension components are in proper working condition. • Notify customers that use of the modified mounts will reduce vibration at cruising speed but may increase vibration at idle. NOTE: Because idle vibration may increase, it is highly recommended to continue using mass production mounts for all other service concerns. 1. Verify concern. 2. Replace the No. 3 & 4 engine mounts with service parts according to the appropriate Workshop Manual section 01-10 ENGINE REMOVAL/INSTALLATION. 3. Center the new engine mounts as outlined in ENGINE MOUNT CENTERING PROCEDURE. 4. Verify repair. ENGINE MOUNT CENTERING PROCEDURE No. 1, No. 3 and No. 4 Engine Mount Adjustment 1. Warm up the engine. 2. Raise and support vehicle on a hoist. 3. Remove engine under cover. 4. Lower the vehicle until the front tires lightly touch the ground. 5. Secure the engine and transaxle using an engine jack and attachment as instructed in No.3 Engine Mount And No.4 Engine Mount Rubber Installation Note in appropriate Workshop Manual, section 01-10 MECHANICAL. 6. Remove two bolts from No. 3 engine mount bracket. REMOVE THE BOLTS 7. Lift engine using jack until No.3 engine mount is lifted slightly from vehicle body. NOTE: • Do not raise engine too much or A/C pipe damage may occur. 8. Move the engine mount rubber or engine until installation hole on the vehicle body aligns with hole in the engine mount bracket. ENGINE MOUNT BRACKET 1532c SHOWN BEFORE ALIGNING THE HOLES SHOWN AFTER ALIGNING THE HOLES 9. Lower the jack and tighten bolts on No. 3 engine mount bracket. Tightening torque: 55.0-77.3 ft-lbf (74.5-04.9 N.m) NOTE: 10. With engine supported as described in STEP 5, remove four (4) nuts and two (2) bolts from No. 4 engine mount top plate. Remove top plate. NOTE: 11. Lift engine again using jack until No.4 engine mount is lifted slightly from vehicle body. NOTE: 12. With top plate of No. 4 engine mount removed, move engine mount bottom plate or engine until all four (4) installation studs on the vehicle align with the engine mount holes. • Do not allow the engine mount bracket to be misaligned. • To access the mount, remove battery box. • Do not raise engine too much or A/C pipe damage may occur. ALIGN THE 4 STUDS IN THE PLATE HOLES 13. Place top plate back on and tighten No. 4 engine mount bracket nuts and bolts to torque indicated. Tightening torque: A.32.5-45.0 ft-lbf (44.0-61.0 N.m) B.61.1-86.7 in-lbf (6.9-9.8 N.m) TIGHTEN BOLTS IN SEQUENCE SHOWN 1532e 14. Lift engine again using jack and loosen the two bolts on the No. 1 engine mount rubber until slightly loose on the No. 1 engine mount rubber.

0

download
The cooling system components include the: block heater (optional) cylinder head temperature sensor fan blade, fan motor and fan shroud assembly radiator pressure relief cap degas bottle radiator draincock water pump oil cooler (optional) water thermostat The water thermostat: controls the engine coolant temperature. allows quicker engine warm-up. The degas bottle: provides a location for system fill. contains coolant expansion and system pressurization. provides air separation during operation. replenishes the engine coolant to the system. The fan blade draws air through the radiator to help cool the engine coolant. The fan motor: operates only when the engine is running. will not operate when the engine is off. The engine coolant flows: from the lower radiator hose to the water pump. from the water pump to the engine block and the cylinder heads. A closed water thermostat returns the engine coolant to the water pump. An open water thermostat allows the engine coolant to flow to the radiator. Unsatisfactory coolant materials: Alcohol-type antifreeze does not provide adequate water pump lubrication. has lower boiling point reduced antifreeze protection Alkaline brine solutions will cause serious engine cooling system damage. The cylinder head temperature sensor provides a signal to the temperature gauge. will invoke failsafe cooling. The optional block heater: electrical heating element is installed in the block cooling jacket. uses a standard 110V (220V in Europe) electrical supply keeps the engine coolant warm during cold weather. The auxiliary water pump (3.9L only): provides heater coolant flow boost. has a secondary function of providing engine-off cooling. Coolant Flow 3.9L

0

download
Fault
Caller reported to the helpline that the vehicle had developed a misfire under load, especially when the engine was hot. It was also mentioned that as the misfire occurred, the engine would suddenly appear to run on only 3 cylinders. The engine running on 3 cylinders would continue until the ignition was switched OFF. If the engine was re-started the engine would run on all 4 cylinders again until the misfire reoccurred under load, and then the engine once again appeared to be running on only 3 cylinders.
Cause
The initial misfire fault under load was finally traced to cylinder no 1 on the engine. The fault was caused by a poor output from the DIS ignition coil pack fitted to the vehicle. Upon testing the vehicle, it was discovered that when the misfire occurred on cylinder no 1, the Multec engine management ECM would switch OFF the fuel injector for the affected cylinder. The caller reported that when the engine was switched OFF and then restarted the misfire would disappear, and the fuel injector for cylinder no 1 would operate normally again